Windows? I remember my grandparents trying to remove some of the furniture that came with (ie. designed with) the home. The couch, and dining room table would not fit out of the doors! Turns out they were put in before the build was finished, and had to be removed by taking out the separately framed and glazed picture windows(3 layer). Yes Grandpa wanted to chop them up, but Grandma threatened more new carpet if sawdust got everywhere. He hired glazers, who helped move them out too.
Try looking on Craigslist or similar for a local homeowner with a garage, or part of one, to rent out. People rent them out for old car storage cheap all the time, I cant really think of why a layout would be refused. A wanted ad wouldn't hurt if you don't find one immediately. Set it up there, and use it to get away from the house on occasion. More money, but many public storage areas have heat, air cond. and electricity in them too. While moving around, a pal had a couple units years back. Built a hotrod in one. In the other one we hung out, drank cold beverages from the fridge, coffee from the pot, sat on his old furniture, and watched TV till our knuckles stopped bleeding. When a building isn't practical, small businesses around here often use them as "bases" as well as storage.
Maybe some special group (retirement home?) would have room for storage in exchange for some holiday/special event "train time" by you.
Splitting it into smaller sections? It may require some additional reworking of scenery, but if its as sturdy as it sounds, and cant be saved otherwise, why not? Pictures of the underside and top. Please...before I get to a thousand words
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